Restart nginx: unknown directive "listen" - amazon-web-services

Question

I've seen that there are already posts on this subject but despite the attempts I still can't do it.
I want to launch nginx via an AWS ec2. When downloading nginx I didn't have the sites-enabled and sites-workable folders, so I followed the instructions here (nginx missing sites-available directory) by creating the files and adding the include line in the http of nginx.config. I also created the symbolique link.
But without success... I have the following error when i restart the server with sudo /etc/init.d/nginx restart
"Starting nginx: nginx: [emerg] unknown directive "listen:" in /etc/nginx/sites-enabled/react-flask-app.conf:2"
This is my /etc/nginx/sites-enabled/react-flask-app.con file:
server {
listen: 80;
root /home/ec2-user/cecs470-web-app-project-team2/test/testest/build;
index index.html;
location: / {
try_files $uri $uri/ =404;
}
}
And this is my /etc/nginx/nginx.conf file.
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /var/run/nginx.pid;
# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/sites-enabled/*;
include /etc/nginx/conf.d/*.conf;
index index.html index.htm;
server {
listen 80 default_server;
listen [::]:80 default_server;
server_name localhost;
root /usr/share/nginx/html;
# Load configuration files for the default server block.
include /etc/nginx/default.d/*.conf;
location / {
}
# redirect server error pages to the static page /40x.html
#
error_page 404 /404.html;
location = /40x.html {
}
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# Settings for a TLS enabled server.
#
# server {
# listen 443 ssl http2 default_server;
# listen [::]:443 ssl http2 default_server;
# server_name _;
# root /usr/share/nginx/html;
#
# ssl_certificate "/etc/pki/nginx/server.crt";
# ssl_certificate_key "/etc/pki/nginx/private/server.key";
# # It is *strongly* recommended to generate unique DH parameters
# # Generate them with: openssl dhparam -out /etc/pki/nginx/dhparams.pem 2048
# #ssl_dhparam "/etc/pki/nginx/dhparams.pem";
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 10m;
# ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
# ssl_ciphers HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP;
# ssl_prefer_server_ciphers on;
#
# # Load configuration files for the default server block.
# include /etc/nginx/default.d/*.conf;
#
# location / {
# }
#
# error_page 404 /404.html;
# location = /40x.html {
# }
#
# error_page 500 502 503 504 /50x.html;
# location = /50x.html {
# }
# }
}
Do you have any leads? Thank you

Answer 1

The listen directive from the following file
my /etc/nginx/sites-enabled/react-flask-app.con
Should be
listen 80;
Yours has :